ferguson



(No Model.) 3 sheets-sheetv 1.

y J. H. FERGUSON.

MACHINE POR TBNONING AND DOVBTAILING.

N0.368,761. Ptentedmg. 23,1887.

r Eff.

' Biff N. PETERS. Phuxe-Lnncmpher, Wa-hinglnn, D. c.

(No Model.)

J. H. FERGUSON.`

3 Sheets-Sheet.

MACHINE FOR TBNONINGr-AND DOAVETAILING.

Patented Aug. 2s, 1887.

N. PErERs, Pl'wto-Linwg'uphen wnsmngtan. D; C.

(No Model.) 3 sheets-sheen 3.

1J. H. FERGUSON.

MACHINE FOR TBNONING AND DOVETAILING.

No. 368,761. v Patented Aug. 23, 1887.

NITE STATES PATENT EErcE.

JAMES H. FERGUSON, OF BROOKLYN, ASSIGNOR TO LOVEJOY, SON & OO.,

OF NEV YORK, N. Y.

MACHINE FOR TENONING AND DOVETAILING.

SPECIFICATION forming part of Letters Patent No. 368,761, dated August23, 18:57.

(No model.)

' of the cut according to the different cuts to be made. in one piece orin different pieces of work; and for this purpose my invention consistsin the novel -means of adjusting the gage, as hereinafter described andclaimed.

Another object of my invention is to afford in a machine for tenoningand dovetailing convenience for the separate use of tw'o cuttersone forcutting a parallel-sided groove'and the other for beveling the edges ofa groove thus cut; and for this purpose my invention oonsists in thecombination, as hereinafter described and claimed, with a stand and aworktable or bed-plate movable relatively thereto, of a grooving-cutterand a dovetailingcutter arranged in line one before the other, theformer of which is attached to the stand and the latter of which iscarried by the movable work-tabie or bed-plate.

Figure 1 in the drawings is aside elevation, partly in section, of atenoning and dovetailing machine embodying my invention. Fig. 2 is aplan of the saine. Fig. 3 is a front elevation of the same. Fig. et is aplan view of a portion of the gage corresponding with Fig.

2, but on a larger scale. Fig. 5 is a vertical section correspondingwith Fig. 4.. Fig. 5* is an inverted plan of the semicircular guideplateof the gage corresponding with Fig. 2. Fig. 6 is a plan illustrating amodification of the gage; and Fig. 7 is a vertical section, on a largerscale, of a part of the gage shown in Fig. 6. l

Similar letters of reference designate corresponding parts in all thefigures.

A designates a stand which supports all the working parts of themachine.

B designates the work-table or bed-plate on which the work is performed,hinged at its rear www end to the standard at a, so that its front endmay be raised up, as shown in dotted outline in Fig. 1, by any suitablemeansas, for instance, by any adjust-able supporting-screw, b, `screwedthrough a fixed bracket, A, provided on the stand A.

O designates a rotary cutter for cutting straight parallel sided groovesworking through a slit, c, in the table B and carried by a horizontalspindle, O, which works in j ournal-boxes Oiixedly secured to thestandA.

D designates the dovetail-cutter, working through a hole, d, in thetable B, and held in a chuck in an upright spindle, D', which works injournal-boXes in a hanger, DIZ, which is fixedly secured to the underside of the table B. The grooving-cutter C is so arranged on its spindleO and the bearings for the upright spindle D 'of the dovetaitcutter Dare so arranged that the cutters are in a line, one before the other, sothat as the work ismoved forward parallel with said line the cutter Owill first cut a plain parallel-sided groove, and the cutter D will cutaway the sides of said groove to produce the dovetail form.

E designates the main shaft ofthe machine, arranged in suitable bearingson the standard A, having a driving-pulley, E, and carrying pulleys O3D3, for driving the two cutter-spindles, by means of belts fg, which runfrom said pulleys to pulleys CDon the respective cutterspindles, thebelt g, which drives the spindle D', running also overguide-pulleysg'gi, which are carried by a tiXed bracket, A2, secured tothe stand A..

F G- designate the gage, consisting of a straight upright plate, F, anda straight hori zontal part, G, at right angles to F. The greaterportion of the length of the part G is fitted to slide in a groove, h,in the upper face of the table B, and a corresponding groove, h, in theunder side of a guide-plate, H, which is represented of semicircularform, and which is secured firmly in any suitable manner-as bydowel-pins Z-to the top of the said table. The adjustment of the gageobtained by the sliding of the part G in the grooves h is effected by ahand-lever, I, which ILO is made by a rod, j, which is connected to thepart G bya pin, j', which is screwed into the said part G, and whichpasses through a slot, ji, (shown dotted in Fig. 2,) provided forit inthe guide-plate H but in the example represented in Fig. 6the said leverI-the connection is made by a toothed sector, ja, provided on it andgearing with a rack, j, rigidly secured to the part G by means of twoscrews, j? j, the latter of said screws passing through the slot j,which is like the corresponding slotin Fig. 2, and is shown dotted inFig. 6 also. v

In the plate H there are provided inverted- T-shaped ways or grooves m,which run in arcs concentric with the axis of the pin or lever fulcrulnc', and in which are arranged any desirable number of adjustable stops nWk, either one of which is capable of receiving a locking-pin, p, whichis carried by the handlever I for the purpose of securing it in variouspositions for the adjustment and locking of the gage. This locking-pinis tted to slide up and down in a guide-block, q, (see Figs. 4, 5, 6,and 7 which is carried by the said lever, and the said pin has appliedto it a lockingspring, s, to press the said pin down into the notches orholes n provided for it in each of the stops n nii, and has also appliedto it an unlocking lever, 11, which has its fulcrum 1" in theguide-block q. In the example shown in Figs. 4 and 5 the locking-springs is spiral and applied within the guide-block, and in the eX- ampleshown in Figs. 6 and 7 it is a bent leafspring attached to the unlockinglever and bearing on the hand-lever I.

The stop-pieces n ni, which are fitted to be adjustable along the ways0r grooves m, are each composed of a bolt, n, and a nut, W, the neck ofthe bolt always fitting the narrow upper part of the groove m. In theexample shown in Figs. 4 and 5 the nut n* fits the wide lower part ofthe groove m, and the bolt n has a head which overlapsthe narrow mouthofthe groove, and in the center of the head is the hole n', to receivethe round lower end of the lockingpin p; but in the example shown inFigs. 5 and 6 the bolt p is inverted and its head ts the wide lower partof the groove, and the nut is screwed onto the end of the bolt whichprojects above the groove, and in this case there is a nick or notch,n', across the nut to receive the lower end of the pin p, which is fiat.To provide for the adjustment of these stops u Wt, their nuts or bolts,as the case may be, are unscrewed, and then the stops, being loose inthe grooves, can be shifted therein Wherever desired. To secure them itis only necessary to screw down the bolts or nuts tight upon the top ofthe plate H.

A single groove, m, in the plate H would provide for a very considerablenicety of adjustment of the stops n n* and consequent nicety ofadjustment of the gage; but an exact adjustment is more easily obtainedby having provided in the said plate two or more grooves, m, each fittedwith adjustable stops. To provide for the use of the one locking-pin pfor the stops in two or more grooves, the 'guideblock q, which holds thesaid pin, is tted to slide in a slot, q', in the hand-lever I, so thatwhen the locking-pin is held up above tops of the stops by grasping thehand-lever and stop-lever together in the hand the hand and locking-pinlever may be moved in lines corresponding with the grooves, and bysliding the hand toward or from the fulcrumt' the locking-lever,guide-block, and locking-pin may be moved in the slot q to present thesaid pin to the stops in either groove. In this way the locking-pin maybe shifted from a stop in one groove to another at any requisitedistance from it in another groove.

Generally in the use of the machine represented for dovetailing thetable B will be depressed, as shown in bold outline in Fig. l, so thatthe cutter C for cutting the parallel-sided groove or rabbet willprotrude through the upper surface of the table, in which case the workplaced on the table will be presented first to the cutter C to have cutin it the parallelsided groove or rabbet, and will be afterwardpresented to the cutter D to have the side or sides of the rabbet orgroove cut to the bevel which produces the dovetail; but there are somecases when it will be desirable to use the cutter D aloneas, forinstance, to finish the dovetailing to the end of a groove which doesnot extend to the end of a piece of work. In such case, after the workhas been moved far enough along the table and gage to have the groove orrabbet out as far as necessary by the cutter G, the table is raised up,as shown in dotted outline in Fig. l, to bring its upper surface and thesuperincumbent lower face of the work above the said cutter, and thework being then fed forward to the cutter D will have 'the dovetailthereby completed to the end of the groove or rabbet.

It is obvious that by simply taking out the dovetail-cutter D from itschuck in the spindle D', the upper end of which is below the upper faceof the table B, the machine represented may be used for tenoning ortonguing and grooving bythe use of the cutter C alone.

What I claim as my invention, and desire to secure by Letters Patent,ism

l. The combination, in a dovetailing-machine, of a fixed stand, a rotarygrooving-cutter and its horizontal spindle supported in bearings on saidstand, a Work-table adjustable up and down on said stand, and adovetail-cutter and its upright spindle supported in bearings carried bysaid work-table in line with said grooving-cutter, whereby said cuttersmay be made to co-operate to produce a dovetail groove, 01 thedovetail-cutter may be used separately, substantially as herein setforth.

2. The combination,with the Work-table or bed-plate of a dovetailing ortenoning machine, of a plate having provided in it one or morearc-formed Ways and secured to the said table or bed-plate, anadjustable gage fitted to slide in or relatively to the said plate,ahand-lever IOO IIO

pivoted to the said plate concentric with said Ways and connected withthe gage, adjustable stops fitted to said Ways and formed with holes ornotches, and alocking-pin attached to said lever for engaging with thehole or notch in either one of said stops to lock the lever,substantially as herein described.

3. The combination, with the gage and its guide-plate provided withaplurality of curved ways for the reception of stops, of stops placed insaid ways, ahand-lever pivoted to said plate and connected with thegage, and a lockingpin attached to said lever and movable length- Wisethereof to permit it to engage with the stops in either of said Ways,substantially as herein described.

. JAMES H. FERGUSON.

Witnesses: v

FREDK. HAYNns, HENRY J. MOBRIDE.

